feature: API/CLI to enable/disable feature per interface

Change-Id: I91d5f5648189143903eb973fdc60de9880fd47c2
Signed-off-by: Pavel Kotucek <pkotucek@cisco.com>

3 files changed, 83 insertions, 2 deletions

diff --git a/vpp/vpp-api/api.c b/vpp/vpp-api/api.c
index e234df8f41a..b2b639a718c 100644
--- a/vpp/vpp-api/api.c
+++ b/vpp/vpp-api/api.c
@@ -89,6 +89,7 @@
 #include <vnet/ipsec-gre/ipsec_gre.h>
 #include <vnet/flow/flow_report_classify.h>
 #include <vnet/ip/punt.h>
+#include <vnet/feature/feature.h>
 
 #undef BIHASH_TYPE
 #undef __included_bihash_template_h__
@@ -466,7 +467,8 @@ _(IPSEC_SPD_DUMP, ipsec_spd_dump)                                       \
 _(IP_FIB_DUMP, ip_fib_dump)                                             \
 _(IP_FIB_DETAILS, ip_fib_details)                                       \
 _(IP6_FIB_DUMP, ip6_fib_dump)                                           \
-_(IP6_FIB_DETAILS, ip6_fib_details)
+_(IP6_FIB_DETAILS, ip6_fib_details)                                     \
+_(FEATURE_ENABLE_DISABLE, feature_enable_disable)
 
 #define QUOTE_(x) #x
 #define QUOTE(x) QUOTE_(x)
@@ -9174,6 +9176,45 @@ vl_api_ipsec_spd_dump_t_handler (vl_api_ipsec_spd_dump_t * mp)
 #endif
 }
 
+static void
+vl_api_feature_enable_disable_t_handler (vl_api_feature_enable_disable_t * mp)
+{
+  vl_api_feature_enable_disable_reply_t *rmp;
+  int rv = 0;
+
+  u8 *arc_name = format (0, "%s%c", mp->arc_name, 0);
+  u8 *feature_name = format (0, "%s%c", mp->feature_name, 0);
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+
+  vnet_feature_registration_t *reg;
+  reg =
+    vnet_get_feature_reg ((const char *) arc_name,
+			  (const char *) feature_name);
+  if (reg == 0)
+    rv = VNET_API_ERROR_INVALID_VALUE;
+  else
+    {
+      clib_error_t *error = 0;
+
+      if (reg->enable_disable_cb)
+	error = reg->enable_disable_cb (sw_if_index, mp->enable);
+      if (!error)
+	vnet_feature_enable_disable ((const char *) arc_name,
+				     (const char *) feature_name,
+				     sw_if_index, mp->enable, 0, 0);
+      else
+	{
+	  clib_error_report (error);
+	  rv = VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE;
+	}
+    }
+
+  vec_free (feature_name);
+  vec_free (arc_name);
+
+  REPLY_MACRO (VL_API_FEATURE_ENABLE_DISABLE_REPLY);
+}
+
 #define BOUNCE_HANDLER(nn)                                              \
 static void vl_api_##nn##_t_handler (                                   \
     vl_api_##nn##_t *mp)                                                \
diff --git a/vpp/vpp-api/custom_dump.c b/vpp/vpp-api/custom_dump.c
index 1dc96650aec..6c181eecacb 100644
--- a/vpp/vpp-api/custom_dump.c
+++ b/vpp/vpp-api/custom_dump.c
@@ -2892,6 +2892,21 @@ static void *vl_api_ioam_disable_t_print
   FINISH;
 }
 
+static void *vl_api_feature_enable_disable_t_print
+  (vl_api_feature_enable_disable_t * mp, void *handle)
+{
+  u8 *s;
+
+  s = format (0, "SCRIPT: feature_enable_disable ");
+  s = format (s, "arc_name %s ", mp->arc_name);
+  s = format (s, "feature_name %s ", mp->feature_name);
+  s = format (s, "sw_if_index %d ", ntohl (mp->sw_if_index));
+  if (!mp->enable)
+    s = format (s, "disable");
+
+  FINISH;
+}
+
 #define foreach_custom_print_no_arg_function                            \
 _(lisp_eid_table_vni_dump)                                              \
 _(lisp_map_resolver_dump)                                               \
@@ -3062,7 +3077,8 @@ _(GET_FIRST_MSG_ID, get_first_msg_id)                                   \
 _(IOAM_ENABLE, ioam_enable)                                             \
 _(IOAM_DISABLE, ioam_disable)                                           \
 _(IP_FIB_DUMP, ip_fib_dump)                                             \
-_(IP6_FIB_DUMP, ip6_fib_dump)
+_(IP6_FIB_DUMP, ip6_fib_dump)                                           \
+_(FEATURE_ENABLE_DISABLE, feature_enable_disable)
   void
 vl_msg_api_custom_dump_configure (api_main_t * am)
 {
diff --git a/vpp/vpp-api/vpe.api b/vpp/vpp-api/vpe.api
index 8a7fac67604..934c4d830d4 100644
--- a/vpp/vpp-api/vpe.api
+++ b/vpp/vpp-api/vpe.api
@@ -5495,3 +5495,27 @@ define ipsec_spd_details {
     u64 packets;
 };
 
+/** \brief Feature path enable/disable request
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - the interface
+    @param enable - 1 = on, 0 = off
+*/
+define feature_enable_disable {
+    u32 client_index;
+    u32 context;
+    u32 sw_if_index;
+    u8 enable;
+    u8 arc_name[64];
+    u8 feature_name[64];
+};
+
+/** \brief Reply to the eature path enable/disable request
+    @param context - sender context which was passed in the request
+    @param retval - return code for the request
+*/
+define feature_enable_disable_reply
+{
+    u32 context;
+    i32 retval;
+};